Coffee-urn.



G. EHRHEART.

COFFEE URN.

APPLICATION FILED MAY I7, I9I5.

Patented May 30,1916.

i UNTTED sTATEs PATENT oEEyicE.

GEORGE EHRI-IEART, OF SIOUX FALLS, SOUTH DAKOTA.

COEEEEQURN.

Specification of Letters Patent.

Patented May 30, 1916.

Application led May l17, 1915. Serial No. 28,708.

there is provided a coffee receptacle and a.

separate hot water receptacle, the water vbeing allowed to flow from the hot water receptacle into the coffee receptacle whenever necessary, and in this form of coffee making apparatus the hot water receptacle has a content approximatelythe same as the content of the coffee receptacle.

" A further disadvantage connected with the ordinary coEee urn is due to the fact that it is not surrounded by an insulating jacket and as a consequence the heat of the coffee is readily dissipated unless the fire is kept constantly going beneath the coffee,A

This tends to cook the coffee too much, often times causes it to boil more or less continu? ously, and fthus the beverage is not only. rendered distasteful but the .toxic effect of the coEee is increased.k

i yThe primaryobject of myv invention is to provide a coffee urn so constructedthat the heat of the coffee is prevented from dissipation and also so constructed thatV the chamber for the hot ,water surrounds the urn proper but is separated therefrom by an air chamber, this air chamber preventing the dissipation of the heat of the coffee con-Q tained within the urn and also' preventing the cold water which maybe turned into the water chamber at times from affecting the contents of the urn. y

A-,further` object of mypinvention is to provide a water, receptacle having an urn disposedtherein with a continuous vacuum T chamber surrounding the exterior of the water receptacle.

Still another object of invention is the provision of means whereby the col'd water may be heated to any desired extent before its passage into the hot water receptacle, whereby a'circulation of the hot water in connection with the heating device may be provided for, and whereby the hot water i from the water receptacle may be turned into theurn or coffee receptacle whenever desired.

A further object of the invention is to so construct the coffee urn that a gas burner may be used for heating the water passing to the water receptacle or heating water for passage directly to the co'ee receptacle or urn proper, and providing for the connection of the coee urn to a city main.

Other objects will appear in the course of u l the following description.

My invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a vertical section through my improved coffee urn; Fig. 2 is an elevation thereof; Fig. 3 is a fragmentary plan view.

Referring t0 these drawings, it will be seen that my improved coffee urn is preferably cylindrical in form and that the body of the coffee urn comprises the exterior wall 2 and the interior wall 3, the exterior and interior walls 2 and 3 extending across the bottom of the` urn and up on either side thereof. The top of the body portion is formed by the spaced walls 4 and 5, which are continuations of the side walls,'these top walls 4 and 5 extending inward toward the axial center of the urn and then being extended downward to formthecentral chamf ber 6. The walls 4 and 5 of the'cofee receptaele and the walls 2 and 3 together inclose a hot water chamber or receptacle 7. The space 8 between the walls of the body portion of the receptacle is exhausted of air so as to provide a vacuum jacket surrounding the water receptacle and extending across the top of the water receptacle. This vacuum vspace or jacket, whichfis designated 8, ViS.

continuous, but the walls are held in spaced c relation to' each other by means of braces 9 disposed at any desired points, these braces 9 'being perforated or otherwise formed so as to provide for a continuous vacuum chamber. The coffee receptacle 6a is supported ,fp

within the chamber 6 in spaced relation' to the wall thereof bylugs 5a. v

The bottom of the coffee receptacle 6 is rounded and from it extends the pipe 10 through which coffee may be discharged,

this pipe 10 aty its exterior end being provided with `any suitable or usual turncock `or cap, designated 10a. The fcover of the cofl'eereceptacle 6 is designated 11, and is alsodouble-walled so as to provide an 1n- :1:

`terior vacuum chamber. This i cover has screw-threaded engagement with the wall of the receptacle 6L and with a flange on the top wall 4, and the cover is preferably provided with a steam valve 12. The hot water space or chamber 7, and also provided upon Y the exterior receptacle is the coffee gage 16, the two ends of which are connected operatively with the` coffee chamber or receppipe into the coffee receptacle 6a.

tacle 6 by means of pipes passing through the double walls of the water receptacle and then through the double Walls of the coffee receptacle.

Extending upward on Ythe exterior of the body 2 is a water pipe 17 which is connected to any source of water, such as a city water main and is provided with a valve 17 a. This pipe extends into a heater casing 18, and the pipe is coiled as at 19 within this casing, then extends outward and upward as at20 and is laterally bent to Vpass through the top of the chamber 7 and into the receptacle 6a as at 21. A valve 22 is provided for regulating the passage of liquid Vthrough this n The pipe 17 is connected to the water chamber 7 by means of a piper23 controlledf by a valve 24, andthe pipe 20 above the coil 19 is connected to the water chamber by means of the pipe A25 controlled by a valve 26. Disposed within the heating chamber '18 is a gas burner, 27

' gasfburner the water within the coil 19 may of any suitable character, shown f as connected to a gaspipe 28. By means of this be heated. i

The practical use of my invention will'be obvious from the above descr-iption.Y When the valves above and below the coil 19 are opened, and the valve 17a flow of cold water is closed, a culation ofthe water from chamberinto and through the 'coil is proi videdV for. VWhen, however, the valve 24 below the coil, and the valve 22 are opened, and the valve 26 closed, the hot waterin the continuous cirhot water chamber 7 will be forced into the coffee receptacle by steam pressure, it being understood that the valve 12 inthe cover l1 should be opened in orderf to permit the pressure in theupper endfof the coffeereceptacle 6 to be reduced. v Y

, The hot water c'ompartmentshouldbe substantially twice'the capacity of the coHeeV compartment or chamber. Thus Acoffee can bemade from the water which is already hot and taken Vfrom the chamber 7, and there would still be suliicient water left in the hot water chamber to operate the latter. If

controlling the n the hot waterv water p ipe entering the heater,

hot water for the purpose of making coffeeA and the hot water compartment would at once have tobe filled with cold water, thus cooling the coffee and making the urn ineliicient. This construction, therefore, does away with the necessity of. using two' urns of equal capacities, the hot water being in one urn and the'coHee .in another. It will be obvious that hot water may also be drawn fromfthe chamberA 7 by means of the tap 29, and that then vthe Vlevel of the water in the hot water chamber may be again raised by allowing the infiow of water through the pipe 17, the heating coil 19, and through the pipe 25, or Coldwater may be allowed to flow directly into the chamber 7, if for any reason this is desirable. By providing the continuous chamber 8 entirely surrounding the hot water chamber 7 and the coffee receptacle or chamber, it makes it possible to 1. An urn of the characterdescribed in-V cluding an outer receptacle, an inner receptacle dependent into the outer receptacleV and provided with a cover, `a water vheater ,dis posed exteriorly to the outer receptacle and connected to a 'source of water supply, connections between the waterfheater and the outer receptacle, and means for conducting the inner receptacleY or conducting water fromthe outer receptacle into the inner receptacle. l' Y 2. In an apparatus of the character described, a body having a side wall,fa

vbottomY wall, and anannular topV wall, 'the top wall being formed with a depressed central portion defining f a chamber, the bottom wall, side wall and top wall of thefir'stbetween the walls being exhausted 'of air, a double-walled Ycover vclosing the top of the second-named chamber `and exhausted of air, an inner receptacle disposed within' the depressed chamber, a water heater, a rfeed' a valved pipe connecting the water pipe to the water chamber below the heater, a Ypipe connecting the upper end of the heaterV tothe upper end of the first-named receptacle and controlled by a valve, and` a pipe connecting the up- MIC V.Water directly Yfrom the water heaterinto Vnamed chamber being double and the space per portion of the water heater to the inner receptacle.

3. In an apparatus of the character described, an exterior receptacle having double walls, the space between said walls being exhausted of air, the top of the receptacle being formed to provide a chamber dependent into the receptacle, an interior receptacle disposed within said chamber, a cover therefor, a hot water heater disposed exteriorly to the exterior receptacle, said heater being connected at one end to a source of cold water supply and at the other end being connected both to the interior and the exterior receptacles, means for admitting cold water into the exterior receptacle, and means for establishing communication between the exterior receptacle and the interior receptacle.

4. In an urn of the character described,

van outer receptacle having double walls, the

space between said walls being devoid of air, the top of the said receptacle being formed `with a depressed portion containing a chamber depending into the outer receptacle, an inner receptacle disposed within said chamber and spaced slightly from the wall thereof, a cover closing the upper end of the chamber and said inner receptacle, a water heater, a water pipe extending through said heater connected below the heater to the outer receptacle and above the heater to the upper portion of said outer receptacle and also connected to said inner receptacle,valves Y for controlling the passage of water Jfrom said Water pipe into or out of said outer receptacle, and a valve controlling the passage of water from the outer receptacle to the inner receptacle.

5. In an urn of the character described, an outer receptacle, the top thereof extending inward and then downward into the interior of thereceptacle to form thereby an air containing chamber, the bottom side and top of the outer receptacle being doublel walled to Cprovide a non-conductive space between sai walls, an interior receptacle disposed within said depending chamber and having shoulders engaging the wall of said chamber and supporting the inner receptacle in spaced relation thereto, a double-walled coverl detachably engaging the upper end of said chamber and closing the inner re* ceptacle, a water heater including a heater pipe connected to a source of supply, and means for conducting the water in said pipe either directly into the outer receptacle or directly into the inner receptacle or causing the water of said outer receptacle to circulate through said heater, and means for conducting water from the outer receptacle into the inner receptacle.

In testimony whereof I hereunto affix my signature in the presence of two witnesses. GEORGE EHRI-IEART.

Witnesses:

L. E. KATTELMANN, L. E. WAGGONER.

Copies of this patent may be obtained for ive cents each, by addressing the "Commissioner or Patents,

Washington. D. G. 

